What is Injection grouting waterproofing? Explain in details with application procedure and typical use.
Injection grouting waterproofing involves injecting a grout mixture into cracks or joints in concrete structures to seal them and prevent water intrusion. The grout mixture is typically composed of a combination of cement, water, and a polymer-based admixture.
The application procedure for injection grouting typically involves the following steps:
- Surface preparation: The surface to be waterproofed must be cleaned of any debris or contaminants that could affect the adhesion of the grout mixture.
- Identification of leaks: The source of the leak must be identified and the location of the cracks or joints that need to be sealed must be marked.
- Holes drilled: Holes are drilled into the concrete at the location of the cracks or joints, and the grout mixture is injected into the holes using a high-pressure pump.
- Grouting: The grout mixture is injected into the cracks or joints, filling them completely and sealing them against water intrusion.
- Curing: The grout mixture must be allowed to cure and harden completely, which typically takes several hours to a few days.
Typical uses of injection grouting include:
- Foundation waterproofing: Injection grouting can be used to seal cracks and joints in basement walls and foundations, providing a barrier against water intrusion.
- Waterproofing of underground structures: Injection grouting can be used to waterproof underground structures such as parking garages, tunnels, and retaining walls.
- Repair of leaks: Injection grouting can be used to repair leaks in concrete structures, sealing the cracks and joints that are causing the leaks.
Injection grouting offers a number of benefits, including ease of application, the ability to seal cracks and joints quickly and effectively, and the ability to provide a continuous, watertight barrier. However, care must be taken during the application process to ensure that the grout mixture is injected evenly and in sufficient quantity to provide a continuous, watertight seal.